Quick answers
- Where does Maureen Diezman see patients?
- Medicare's clinician data lists 3 practice locations, including Columbia, MD, Aldie, VA and Arlington, VA. Call before your visit to confirm the address.
- What is Maureen Diezman's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Maureen Diezman accept Medicare assignment?
- Yes. Medicare's clinician data says Maureen Diezman accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Maureen Diezman?
- (571) 977-6870, as listed in official Medicare / NPI Registry data.
- What is Maureen Diezman's NPI number?
- 1598541856. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Maureen Diezman is enrolled with Medicare (CMS data updated 2026-10-02).
- 10400 Little Patuxent PkwyColumbia, MD 21044 (571) 977‑6870
- 24560 Southpoint Dr, Suite 260Aldie, VA 20105 (571) 248‑7493
- 2501 N Glebe Rd, Suite 303Arlington, VA 22207 (703) 841‑1290
Group practices
Medicare enrollment lists Maureen Diezman as a member of this group (CMS data updated 2026-10-02).
- Columbia Associates in Psychiatry PC149 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Columbia
Clinicians with the same Medicare primary specialty in Columbia, MD — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598541856 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians